JSFiddle - React, Tailwind, and code Playground

by Naeel Maqsudov

HTML

<table border="1">
    <tr>
        <td></td>
        <td></td>
        <td></td>
    </tr>
    <tr>
        <td></td>
        <td>
            <table id="t2">
                <tr>
                    <td id="c1">123</td>
                    <td>123</td>
                </tr>
                <tr>
                    <td>123</td>
                    <td>123</td>
                </tr>
            </table>
        </td>
        <td></td>
    </tr>
    <tr>
        <td></td>
        <td></td>
        <td></td>
    </tr>
</table>

CSS

#t2{
    border-collapse:collapse; 
}
#t2 td {
    border: 1px solid red;
}
#c1{
    border-color: blue;
    border-width: 5px;
}